.page-about {
  --about-teal-soft: rgba(15, 118, 110, 0.18);
  --about-wine-soft: rgba(153, 27, 27, 0.24);
  --about-blue-soft: rgba(37, 99, 235, 0.16);
  --about-orange-soft: rgba(249, 115, 22, 0.14);
  position: relative;
}

/* 首屏 */
.sv-about-hero {
  padding: clamp(2.5rem, 6vw, 5rem) 0 clamp(2rem, 5vw, 4rem);
  background:
    radial-gradient(ellipse 80% 70% at 90% 0%, var(--about-blue-soft), transparent 70%),
    var(--color-bg);
  border-bottom: 2px solid var(--color-border);
  position: relative;
  overflow: hidden;
}

.sv-about-hero::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 38%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
}

.sv-about-hero__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gutter);
}

.sv-about-hero__aside {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-family: var(--font-sans);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--color-text-faint);
}

.sv-about-hero__index {
  font-weight: 800;
  font-size: 0.75rem;
  color: var(--color-text-dim);
  line-height: 1.4;
}

.sv-about-hero__divider {
  width: 2.5rem;
  height: 1px;
  background: var(--color-primary);
  display: inline-block;
}

.sv-about-hero__range {
  font-variant-numeric: tabular-nums;
}

.sv-about-hero__content {
  display: grid;
  gap: 1.25rem;
}

.sv-about-hero__title {
  margin: 0;
  font-size: clamp(2.2rem, 7vw, 3.8rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  font-weight: 800;
}

.sv-about-hero__title span {
  display: inline-block;
  margin-top: 0.15em;
  color: var(--color-primary-bright);
  background: linear-gradient(90deg, var(--color-primary-bright), var(--color-accent));
  -webkit-background-clip: text;
  background-clip: text;
}

.sv-about-hero__lead {
  margin: 0;
  max-width: 40em;
  color: var(--color-text-dim);
  font-size: clamp(1rem, 2vw, 1.125rem);
  line-height: 1.7;
}

.sv-about-hero__stats {
  margin: 0.75rem 0 0;
  padding: 1.25rem 0 0;
  border-top: 2px solid var(--color-border);
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem 1.5rem;
}

.sv-about-hero__stat dt {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-faint);
  margin-bottom: 0.25rem;
}

.sv-about-hero__stat dd {
  margin: 0;
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--color-text);
}

.sv-about-hero__stat strong {
  font-size: 1.1em;
  color: var(--color-accent);
}

/* 品牌故事 */
.sv-about-story {
  padding: clamp(3rem, 7vw, 5.5rem) 0;
  background: var(--color-bg);
}

.sv-about-story__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gutter);
}

.sv-about-story__aside {
  display: grid;
  gap: 1.25rem;
  align-content: start;
}

.sv-about-story__refrain {
  margin: 0;
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--color-primary-bright);
}

.sv-about-story__rule {
  width: 3.5rem;
  height: 3px;
  background: var(--color-primary);
  display: block;
}

.sv-about-story__main {
  display: grid;
  gap: 1.5rem;
}

.sv-about-story__title {
  margin: 0;
  font-size: clamp(1.6rem, 4vw, 2.5rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.sv-about-story__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.sv-about-story__copy p {
  margin: 0 0 1rem;
  color: var(--color-text-dim);
  line-height: 1.8;
}

.sv-about-story__copy p:last-child {
  margin-bottom: 0;
}

.sv-about-story__media {
  margin: 0;
}

.sv-about-story__media figcaption {
  margin-top: 0.75rem;
  font-size: 0.8rem;
  color: var(--color-text-faint);
}

.sv-about-story__media img,
.sv-about-team__media img,
.sv-about-credential__media img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* 发展历程 */
.sv-about-history {
  padding: clamp(3rem, 7vw, 5.5rem) 0;
  background: linear-gradient(180deg, var(--color-surface), var(--color-bg) 60%);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.sv-about-history__head {
  display: grid;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.sv-about-history__head-main {
  display: grid;
  gap: 0.85rem;
}

.sv-about-history__title {
  margin: 0;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-weight: 800;
}

.sv-about-history__intro {
  margin: 0;
  max-width: 34em;
  color: var(--color-text-dim);
  line-height: 1.7;
}

.sv-about-history__list {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.sv-about-history__list::before {
  content: "";
  position: absolute;
  left: 1.15rem;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 2px;
  background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-accent) 100%);
}

.sv-about-history__item {
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.sv-about-history__item:last-child {
  margin-bottom: 0;
}

.sv-about-history__marker {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  padding-top: 0.35rem;
}

.sv-about-history__marker::before {
  content: "";
  width: 0.875rem;
  height: 0.875rem;
  border-radius: 50%;
  background: var(--color-bg);
  border: 3px solid var(--color-primary);
  box-shadow: 0 0 0 3px var(--about-blue-soft);
}

.sv-about-history__marker::after {
  content: "";
  position: absolute;
  top: 0.55rem;
  width: 0.25rem;
  height: 0.25rem;
  border-radius: 50%;
  background: var(--color-accent);
}

.sv-about-history__version {
  font-size: 0.62rem;
  font-weight: 700;
  color: var(--color-text-dim);
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.sv-about-history__card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-primary);
  padding: 1rem 1.1rem;
  transition: border-color 0.25s ease, transform 0.25s ease, background 0.25s ease;
}

.sv-about-history__item:hover .sv-about-history__card {
  border-color: var(--color-primary);
  transform: translateX(4px);
  background: rgba(37, 99, 235, 0.1);
}

.sv-about-history__year {
  margin: 0 0 0.25rem;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
}

.sv-about-history__card h3 {
  margin: 0 0 0.4rem;
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.sv-about-history__card p:last-child {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--color-text-dim);
}

/* 团队与文化 */
.sv-about-team {
  padding: clamp(3rem, 7vw, 5.5rem) 0;
  background: linear-gradient(135deg, var(--about-teal-soft), transparent 60%);
  position: relative;
}

.sv-about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gutter);
}

.sv-about-team__aside,
.sv-about-team__main {
  display: grid;
  gap: 1rem;
  align-content: start;
}

.sv-about-team__title {
  margin: 0;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-weight: 800;
}

.sv-about-team__note {
  margin: 0;
  color: var(--color-text-dim);
  line-height: 1.7;
}

.sv-about-team__media {
  margin: 0;
}

.sv-about-team__text {
  margin: 0;
  color: var(--color-text-dim);
  line-height: 1.8;
}

.sv-about-team__facts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
  margin: 0;
  padding: 1rem;
  background: var(--color-surface);
  border-left: 3px solid var(--color-teal);
}

.sv-about-team__facts div {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  align-items: baseline;
}

.sv-about-team__facts dt {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-faint);
}

.sv-about-team__facts dd {
  margin: 0;
  font-weight: 600;
  color: var(--color-text);
}

/* 资质与合作 */
.sv-about-credential {
  padding: clamp(3rem, 7vw, 5.5rem) 0;
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
}

.sv-about-credential__inner {
  display: grid;
  gap: 2rem;
}

.sv-about-credential__head {
  display: grid;
  gap: 0.75rem;
  align-content: start;
}

.sv-about-credential__title {
  margin: 0;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-weight: 800;
}

.sv-about-credential__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.sv-about-credential__card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 1.5rem 1.25rem;
  display: grid;
  gap: 0.75rem;
  align-content: start;
  position: relative;
  overflow: hidden;
}

.sv-about-credential__card::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 3rem;
  height: 3rem;
  background: var(--about-blue-soft);
  clip-path: polygon(100% 0, 0 0, 100% 100%);
}

.sv-about-credential__card::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 0;
  border-left: 14px solid var(--color-accent);
  border-bottom: 14px solid transparent;
}

.sv-about-credential__card--security::before {
  background: var(--about-wine-soft);
}

.sv-about-credential__card--coverage::before {
  background: var(--about-blue-soft);
}

.sv-about-credential__card--partner::before {
  background: var(--about-teal-soft);
}

.sv-about-credential__index {
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--color-primary-bright);
}

.sv-about-credential__card--security .sv-about-credential__index {
  color: #F87171;
}

.sv-about-credential__card--coverage .sv-about-credential__index {
  color: var(--color-primary-bright);
}

.sv-about-credential__card--partner .sv-about-credential__index {
  color: #2DD4BF;
}

.sv-about-credential__card h3 {
  margin: 0;
  font-size: 1.2rem;
  font-weight: 700;
}

.sv-about-credential__card p {
  margin: 0;
  color: var(--color-text-dim);
  line-height: 1.7;
  font-size: 0.95rem;
}

.sv-about-credential__media {
  margin: 0.5rem 0 0;
}

/* 用户承诺 */
.sv-about-promise {
  padding: clamp(3rem, 7vw, 5.5rem) 0;
  background:
    radial-gradient(ellipse 70% 50% at 15% 20%, var(--about-orange-soft), transparent 70%),
    var(--color-surface);
  position: relative;
}

.sv-about-promise__title {
  margin: 1rem 0 2rem;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-weight: 800;
}

.sv-about-promise__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.sv-about-promise__item {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  padding: 1.5rem 1.25rem;
  position: relative;
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.sv-about-promise__item:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
}

.sv-about-promise__item h3 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
}

.sv-about-promise__item p {
  margin: 0;
  color: var(--color-text-dim);
  font-size: 0.92rem;
  line-height: 1.75;
}

.sv-about-promise__cta {
  margin-top: 2.5rem;
  padding: 1.75rem 1.5rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  display: grid;
  gap: 1rem;
  justify-items: start;
}

.sv-about-promise__cta p {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
}

.sv-about-promise__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* 底部导航 */
.sv-about-guide {
  padding: 2.5rem 0 3.5rem;
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
}

.sv-about-guide .container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--color-border);
  border: 1px solid var(--color-border);
}

.sv-about-guide__link {
  background: var(--color-surface);
  padding: 1.5rem 1.25rem;
  text-decoration: none;
  display: grid;
  gap: 0.35rem;
  transition: background 0.25s ease;
}

.sv-about-guide__link:hover {
  background: var(--color-primary);
}

.sv-about-guide__link span {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-faint);
}

.sv-about-guide__link strong {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-text);
}

/* 媒体查询 */
@media (min-width: 768px) {
  .sv-about-hero__inner {
    grid-template-columns: 180px 1fr;
    gap: 2.5rem;
  }

  .sv-about-hero__aside {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.25rem;
    padding-top: 0.25rem;
  }

  .sv-about-hero__stats {
    grid-template-columns: repeat(4, 1fr);
  }

  .sv-about-story__inner {
    grid-template-columns: minmax(160px, 220px) 1fr;
    gap: 3rem;
  }

  .sv-about-story__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
    align-items: start;
  }

  .sv-about-history__head {
    grid-template-columns: minmax(160px, 220px) 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
  }

  .sv-about-history__item {
    grid-template-columns: 3rem 1fr;
    gap: 1.5rem;
    margin-bottom: 1.75rem;
  }

  .sv-about-team__grid {
    grid-template-columns: minmax(200px, 1fr) minmax(0, 1.4fr);
    gap: 3rem;
  }

  .sv-about-team__facts {
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
  }

  .sv-about-team__facts div {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }

  .sv-about-credential__inner {
    grid-template-columns: 240px 1fr;
    gap: 3rem;
  }

  .sv-about-credential__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }

  .sv-about-promise__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }

  .sv-about-guide .container {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1024px) {
  .sv-about-promise__grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .sv-about-history__card {
    padding: 1.25rem 1.5rem;
  }
}